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United States Patent | 6,085,592 |
Kawashima | July 11, 2000 |
A short ring is mounted onto a back part of a housing of an ultrasonic sensor so that the short ring is coaxial with the housing. The width of the short ring along the axial direction of the housing is set such that it shields the back part of the housing including a transformer of a processor. The short ring is made up of an excellent metal conductor and is coaxial with the coils of the transformer.
Inventors: | Kawashima; Yasuhiro (Kariya, JP) |
Assignee: | Denso Corporation (Kariya, JP) |
Appl. No.: | 949474 |
Filed: | October 14, 1997 |
Oct 15, 1996[JP] | 8-272693 |
Current U.S. Class: | 73/632; 73/432.1; 73/598; 367/99; 367/909 |
Intern'l Class: | G01N 029/24 |
Field of Search: | 367/99,909,13,902,188 340/904,943,939,942 73/597,598,602,627,432.1,632 |
3935484 | Jan., 1976 | Leschek et al. | 310/327. |
4326273 | Apr., 1982 | Vancha | 367/112. |
4701893 | Oct., 1987 | Muller et al. | 367/87. |
4796726 | Jan., 1989 | Kobayashi et al. | 181/123. |
4803670 | Feb., 1989 | Chen | 367/99. |
4918672 | Apr., 1990 | Iwabuchi et al. | 367/99. |
4994800 | Feb., 1991 | Milliken | 340/901. |
5495765 | Mar., 1996 | Dykes et al. | 73/632. |